5 PcsREES52 HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor For Arduino

It came with bad packaging (not cardboard box, just a cardboard wrapped around a plastic cover that contained sensors) atleast for me. 1 of them didn't work. Make sure to check on how to use these modules before buying so that you check their condition (like use a small program).My problems aside, the 4 working sensors work within HC-SR04 specification, so i have no issues with it.I would 4.5 rating, if it was allowed.

The return time period is extremely short, cannot test it now.The product does not seem damaged in transit, but your mileage may vary. That is, you could get damaged product.

Absolutely cheap & useless sensors!! Two pcs. came damaged only... (see picture attached). I lost all the sensors after few hours of use in my projects as the sensors results were going haywire and never accurate, mostly getting stuck to a min. distance of 25-30cm. or so!! I had to replace all with new lot purchased from another supplier and all was perfectly working fine.Unfortunately, I opened my packet after some days and once I found them all faulty, my return window was closed! I can, now, only request Amazon if they can help in getting either a good replacement or a full refund.

The product is good and working properly but it has some scratches in it